Visual viewport controls
Download this addon 
Blender > File > User Preferences (Ctrl+Alt+U) > 


Add-ons Tab > Install from file... > Choose the downloaded file > Save user setting
Input Tab 



  Save user settings > Close User Preferences




Now in the viewport you can use


touchpad > drag = rotate
touchpad > Alt+drag = moving
touchpad > Ctrl+Alt+drag = zoom


In the Node Editor you can use


touchpad > Alt+drag = moving
touchpad > Ctrl+Alt+drag = zoom